On Earth - it's the Sun.
All living things require a source of energy.
glucose is the source of energy for all living things.
The primary source of energy for living organisms is the sun. Through the process of photosynthesis, plants and other photosynthetic organisms convert sunlight into chemical energy stored in the form of glucose, which is used by all living things as a source of fuel for cellular processes.
The ultimate source of energy for living systems on Earth is the sun. Plants and some microorganisms use sunlight to perform photosynthesis, converting solar energy into chemical energy stored in organic molecules. This energy is then passed through the food chain as organisms consume other organisms.
from the source of energy
Glucose
The sun
The sun
The sun.
the sun
The Sun.
The Sun :D